NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

1 Hard

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Homoleptic octahedral complexes of a metal ion '

{M^{3 + }}

' with three monodentate ligands

{L_1},{L_2}

and

{L_3}

absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is

View answer and explanation

Correct option: C

{L_3} < {L_1} < {L_2}

Option C (

{L_3} < {L_1} < {L_2}

) is correct because the energy absorbed is inversely proportional to the wavelength, and the ligand strength is directly proportional to the energy absorbed. Red < Green < Blue implies

{L_3} < {L_1} < {L_2}

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The complexes

\left[ {\mathrm{PtC}{\mathrm{l}_2}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\mathrm{B}{\mathrm{r}_2}\mathrm{\;and\;}\left[ {\mathrm{PtB}{\mathrm{r}_2}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\mathrm{C}{\mathrm{l}_2}\mathrm{\;}

are example for isomerism The total number of stereoisomers for the complex

\left[\mathrm{Cr}(\mathrm{Ox})_{2} \mathrm{ClBr}\right]^{3-}

(where

\text{ox =}

oxalate) is The value of

x

on the

{\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right]^x}

is: Excited state configuration of

\mathrm{M}{\mathrm{n}^{2 + }}

\mathrm{CuS}{\mathrm{O}_4}

decolourises on addition of KCN, the product is: The IUPAC name of

{\mathrm{K}_2}\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right]